<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 警告区域 -->
      <el-alert title="注意：只允许为第三级分类设置相关参数" type="warning" :closable="false" show-icon>
      </el-alert>
      <!-- 商品分类区域 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <!-- 级联选择框 -->
          <el-cascader v-model="selectedCateKeys" :options="cateList" :props="{ expandTrigger: 'hover' ,...cateProps}" @change="handleChange"></el-cascader>
        </el-col>

        <!-- 页签 -->
        <el-col>
          <el-tabs v-model="activeName" @tab-click="handleTabClick">
            <!-- 动态参数 -->
            <el-tab-pane label="动态参数" name="many">
              <el-button type="primary" :disabled="selectedCateKeys.length ===3 ? false:true" size="mini" @click="addDialogVisible = true">添加参数</el-button>
              <el-table :data="manyTabData" border stripe>
                <el-table-column type="expand">
                  <template slot-scope="scope">
                    <el-tag v-for="item,index in scope.row.attr_vals" :key="index" closable @close="handleClose(scope.row,index)">
                      {{item}}
                    </el-tag>
                    <!-- 添加 -->
                    <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInputRef" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)">
                    </el-input>
                    <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">添加</el-button>
                  </template>
                </el-table-column>
                <el-table-column type="index">
                </el-table-column>
                <el-table-column prop="attr_name" label="参数名称"></el-table-column>
                <el-table-column label="操作">
                  <template slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(scope.row.attr_id)">删除</el-button>
                  </template>
                </el-table-column>
              </el-table>
            </el-tab-pane>
            <!-- 静态属性 -->
            <el-tab-pane label="静态属性" name="only">
              <el-button type="primary" :disabled="selectedCateKeys.length ===3 ? false:true" size="mini" @click="addDialogVisible = true">添加属性</el-button>
              <el-table :data="onlyTabData" border stripe>
                <el-table-column type="expand">
                  <template slot-scope="scope">
                    <el-tag v-for="item,index in scope.row.attr_vals" :key="index" closable @close="handleClose(scope.row,index)">
                      {{item}}
                    </el-tag>
                    <!-- 添加 -->
                    <el-input class="input-new-tag" v-if="scope.row.inputVisible" v-model="scope.row.inputValue" ref="saveTagInputRef" size="small" @keyup.enter.native="handleInputConfirm(scope.row)" @blur="handleInputConfirm(scope.row)">
                    </el-input>
                    <el-button v-else class="button-new-tag" size="small" @click="showInput(scope.row)">添加</el-button>
                  </template>
                </el-table-column>
                <el-table-column type="index"></el-table-column>
                <el-table-column prop="attr_name" label="属性名称"></el-table-column>
                <el-table-column label="操作">
                  <template slot-scope="scope">
                    <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(scope.row.attr_id)">删除</el-button>
                  </template>
                </el-table-column>
              </el-table>
            </el-tab-pane>
          </el-tabs>
        </el-col>
      </el-row>
    </el-card>

    <!-- 添加表单 -->
    <el-dialog :title="'添加'+titleText" :visible.sync="addDialogVisible" width="50%" @close="addDialogClose">
      <!-- 表单 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams ">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改表单 -->
    <el-dialog :title="'修改'+titleText" :visible.sync="editDialogVisible" width="50%" @close="editDialogClose">
      <!-- 表单 -->
      <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
        <el-form-item :label="titleText" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams ">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      cateList: [],
      //级联选择器配置对象
      cateProps: {
        value: "cat_id",
        label: "cat_name",
        children: "children",
      },
      //级联选择框双向绑定到的数组
      selectedCateKeys: [],
      activeName: "many",
      //动态参数数据
      manyTabData: [],
      //静态参数数据
      onlyTabData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: "",
      },
      //添加表单验证规则
      addFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
      editDialogVisible: false,
      editForm: {
        attr_name: "",
      },
      editFormRules: {
        attr_name: [
          { required: true, message: "请输入参数名称", trigger: "blur" },
        ],
      },
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data } = await this.$http.get(`categories`);
      if (data.meta.status != 200) {
        return this.$message.error("获取商品分类列表失败");
      }
      this.cateList = data.data;
    },
    //级联选择框变化时
    handleChange() {
      this.getParamsList();
    },
    // 页签点击事件处理函数
    handleTabClick() {
      this.getParamsList();
    },
    //获取参数
    async getParamsList() {
      if (this.selectedCateKeys.length != 3) {
        this.onlyTabData = [];
        this.manyTabData = [];
        this.selectedCateKeys = [];
        return;
      }
      const { data } = await this.$http.get(
        `categories/${this.catId}/attributes`,
        {
          params: { sel: this.activeName },
        }
      );

      if (data.meta.status !== 200) {
        return this.$message.error("获取参数列表失败");
      }
      data.data.forEach((item) => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(" ") : [];
        item.inputVisible = false;
        item.inputValue = "";
      });
      if (this.activeName === "many") {
        this.manyTabData = data.data;
      } else {
        this.onlyTabData = data.data;
      }
    },
    addDialogClose() {
      this.$refs.addFormRef.resetFields();
    },
    addParams() {
      this.$refs.addFormRef.validate(async (valid) => {
        const { data } = await this.$http.post(
          `categories/${this.catId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        if (data.meta.status != 201) {
          return this.$message.error("添加参数失败");
        }
        this.$message.success("添加参数成功");
        this.addDialogVisible = false;
        this.getParamsList();
      });
    },
    async showEditDialog(attr_id) {
      const { data } = await this.$http.get(
        `categories/${this.catId}/attributes/${attr_id}`,
        {
          params: { attr_sel: this.activeName },
        }
      );
      if (data.meta.status != 200) {
        return this.$message.error("获取数据失败");
      }
      this.editForm = data.data;
      this.editDialogVisible = true;
    },
    editDialogClose() {
      this.$refs.editFormRef.resetFields();
    },
    editParams() {
      this.$refs.editFormRef.validate(async (valid) => {
        if (!valid) return;
        console.log(this.activeName);
        const { data } = await this.$http.put(
          `categories/${this.catId}/attributes/${this.editForm.attr_id}`,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName,
          }
        );
        console.log(data);
        if (data.meta.status !== 200) {
          return this.$message.error("修改失败");
        }
        this.$message.success("修改成功");
        this.getParamsList();
        this.editDialogVisible = false;
      });
    },
    deleteParams(attr_id) {
      this.$confirm("此操作将永久删除该属性, 是否继续?", "提示", {
        confirmButtonText: "确定",
        cancelButtonText: "取消",
        type: "warning",
      })
        .then(() => {
          this.$http
            .delete(`categories/${this.catId}/attributes/${attr_id}`)
            .then(() => {
              this.$message({
                type: "success",
                message: "删除成功!",
              });
              this.getParamsList();
            })
            .catch(() => {
              this.$message.error("删除失败");
            });
        })
        .catch(() => {
          this.$message({
            type: "info",
            message: "已取消删除",
          });
        });
    },
    handleInputConfirm(row) {
      if (row.inputValue.trim().length === 0) {
        row.inputValue = "";
        row.inputVisible = false;
        return;
      }
      row.attr_vals.push(row.inputValue.trim());
      row.inputValue = "";
      row.inputVisible = false;

      this.$http
        .put(`categories/${this.catId}/attributes/${row.attr_id}`, {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(" "),
        })
        .then(() => {
          this.$message.success("添加成功");
        })
        .catch(() => {
          this.$message.error("添加失败");
        });
    },
    showInput(row) {
      row.inputVisible = true;
      this.$nextTick((_) => {
        this.$refs.saveTagInputRef.focus();
      });
    },
    handleClose(row, index) {
      row.attr_vals.splice(index, 1);
      this.$http
        .put(`categories/${this.catId}/attributes/${row.attr_id}`, {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(" "),
        })
        .then(() => {
          this.$message.success("删除成功");
        })
        .catch(() => {
          this.$message.error("删除失败");
        });
    },
  },
  computed: {
    catId() {
      if (this.selectedCateKeys.length === 3) {
        return this.selectedCateKeys[2];
      }
      return null;
    },
    titleText() {
      if (this.activeName === "many") {
        return "动态参数";
      } else {
        return "静态属性";
      }
    },
  },
};
</script>

<style lang="less">
.cat_opt {
  margin: 20px 0;
}
.el-cascader {
  width: 20%;
}
.input-new-tag {
  width: 150px;
}
</style>